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Kestrel® 4400 Heat Stress Tracker




Availability: In Stock
Stock Number: 89549
  • Price:
  • $27.00
 
  • Description
  • Specifications
  • Reviews
  • Q&A
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Kestrel Meter Portable Compact Tripod

Works with compatible Kestrel® Pocket Weather Meters.

The Kestrel 4400 provides vital heat stress information to help you work safely in hot conditions. The meter calculates Wet Bulb Globe Temperature, the most common composite measurement in determining appropriate exposure levels during heat stress conditions. The Kestrel 4400 also displays Thermal Work Limit, another valuable composite heat stress prediction tool. On-screen alarms alert you when conditions enter the caution and danger zones, allowing you to take appropriate precautions to avoid heat-related illness. The Kestrel 4400 also measures naturally aspirated wet bulb temperature, globe temperature, wind speed, temperature (°F or °C), wind chill, relative humidity, heat stress index, dew point temperature, wet bulb temperature, barometric pressure, altitude, and density altitude. Combine the Kestrel 4400 with a portable vane mount (included) and a portable tripod (sold separately) for a data-logging weather station that rotates in even the slightest breeze and is ideal for short-term monitoring. Measurements are shown on a backlit display, and customized user screens group key measurements. Minimum, maximum, and average values are displayed for every measurement. The Kestrel 4400 is waterproof (IP67 standard) and floats. Includes a protective transport case, protective pouch, portable vane mount, and 2 AAA batteries. Five-year manufacturer’s warranty. Assembled in the USA.

*Humidity sensor can be recalibrated in the field. Accurate readings may be taken beyond these temperature limits by exposing the unit for the minimum time necessary to take and record measurements.

Brand: Kestrel
MPN: 0799
UPC: 0730650001170
UNSPSC: 41114400

Minimum wind speed: 0.7 mph (0.6 knots, 1 km/h, 0.3 m/s, or 59 fpm). Maximum wind speed: 89 mph (78 knots, 144 km/h, 40 m/s, or 7,877 fpm). Wind speed accuracy: ±3%. Update: 1 second. Thermal work limit accuracy: ±10.9 W/m2. Outdoor wet bulb globe temperature: ±1.3°F (0.7°C). Wet bulb temperature (Naturally aspirated): ±1.4°F (0.8°C). Wet bulb temperature (Psychrometric): ±3.2°F (1.8°C). Temperature and wind chill accuracy: ±1°C. Wind chill factor resolution: ±1°C. Relative humidity accuracy: ±3% from 5% to 95%. Dew point temperature accuracy: ±2°C. Heat index accuracy: ±3°C*. Temperature resolution: ±0.1°F (±0.1°C). Barometric pressure accuracy: ±3hPa (between -10°C and 60°C). Altitude range: at 77.0°F, <19,700’, max error ±98’ (at 25.0°C, <6,000 m, max error ±30 m). Density altitude range: 32.0°F to 100.0°F, 5.0 to 95.0% RH, 8.86 to 32.48 inHg, <19,700’ (0.0°C to 37.8°C, 5.0 to 95.0% RH, -2,000 to 9,000 hPa, <6,000 m). Operating temperature: -4°F to +140°F (-20°C to +60°C). Temperature range: -20°F to +158°F (-29°C to +70°C). Accurate readings can be taken by keeping the unit warmer than -4°F (-20°C) and exposing it for the minimum time necessary (less than one minute) to take a reading. Impeller: 1” diameter, sapphire bearings, lightweight. Temperature sensor: hermetically sealed precision thermistor. Humidity sensor: solid state silicon capacitive sensor. Display: graphical backlit LCD. Sealing: electronics enclosure IP67 water resistant to 3 ft., Floats. Battery: two AAA alkaline batteries (included). Battery life: 400 hrs. Dimensions: 6.5” x 2.3” x 1.1”.
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